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Companies / Sionna Therapeutics

Sionna Therapeutics

Waltham, United States

Sionna Therapeutics is a clinical-stage biopharmaceutical company developing novel medicines to improve the function of the cystic fibrosis transmembrane conductance regulator protein for cystic fibrosis patients

Healthcare & Biotech

Sionna Therapeutics, based in Waltham, United States, has 2 investors on file, among them Atlas Venture and RA Capital. Its site was last checked 6 Nov 2026: site answers.

sionnatx.com

Investors

2 investors on file
InvestorEvidenceType
Atlas VenturePortfolio pageVenture capital
RA CapitalPortfolio pageVenture capital

In the news

1 headline naming Sionna Therapeutics
Sionna Therapeutics Reports Third Quarter 2026 Financial Resultsmanilatimes.net

Each headline is matched with evidence and opens on its outlet. Some come through the GDELT Project.

More from Atlas Venture

52 companies on its checked portfolio

Its portfolio leans to Healthcare & Biotech (93%), Industrial & Manufacturing (2%), Robotics & Hardware (2%).

Accent TherapeuticsAccent Therapeutics develops small molecule therapeutics for patients …Alnylam PharmaceuticalsAlnylam Pharmaceuticals develops RNAi therapeutics.Bicycle TherapeuticsBicycle Therapeutics is developing precision-guided therapeutics to ta…Cogent BiosciencesCogent Biosciences conducts clinical trials and develops treatments fo…ComancheComanche Biopharma is a biopharmaceutical company developing an invest…

See Atlas Venture's full profile · Who invests alongside it

More from RA Capital

215 companies on its checked portfolio

Its portfolio leans to Healthcare & Biotech (86%), Industrial & Manufacturing (4%), AI & Machine Learning (2%).

89 Bio, Inc. (Alumni)AN2 TherapeuticsAN2 Therapeutics develops boron-based medicines for various diseases, …ARS PharmaceuticalsARS Pharmaceuticals develops patient-friendly treatments, including a …AbcuroAbcuro develops therapies for autoimmune diseases and cancer.Aclaris TherapeuticsAclaris Therapeutics is a biopharmaceutical company that strives to tr…

See RA Capital's full profile · Who invests alongside it

A company is shown only after its own site answers and carries its name. Sites are checked again on a schedule, because domains lapse and get bought. Round stages and dates come from Fundup AI; investor links come from portfolio pages and rounds; other facts name their source when you point at them. How we grade the data

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VCinfo API
$ curl -H "X-API-Key: YOUR_KEY" \
  https://api.vcinfo.io/v1/companies/sionnatx.com/investors

# also
GET /v1/companies/sionnatx.com
GET /v1/companies/sionnatx.com/news
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